Air Con not cold - Advise required

[bigshout]

Guy's i've only had my X5 a week and with the weather we have had today noticed the AC wasn't cold. Decided I would take the X5 to have the AC re gassed. the job is all computer driven and no room for engineer error however the engineer I has was very informative and knew what he was doing.

Anyway after 30 minutes the re-gassing was completed but unfortunately the temp did not go down, on the up side they did not charge me as this is their policy if they can't bring the temperature down.

The result are that I don't have a leak, the car was holding 270g gas and 2ml of oil before th regass and the machine inserted 440g gas and 12ml of oil. Unusually the reading given was that the low pressure reading was high at 7 bar and the high pressure reading low at 6 bar.

The AC control in the car operates fine, it blows hot or ambient, controls work as far as I can see. I can't say I've seen the AUX fan operate, now from reading what I can find on this forum I've narrowed down the issue to either the final stage relay, the compressor it's self or the Aux fan. What I'm not in a position to do it purchase these items from BMW to find some of the parts are not needed.

Has anyone any ideas on how the diagnose this issue, ie a step by step guide on what I should be doing to identify what and where to look, I don't even know where to locate the compressor. are there drawings on the internet?


The car is a 2004 4.4i with 62k miles.